How do I trigger the TDD workflow in Claude?

You can activate it using natural language phrases like 'Implement with TDD', 'Write tests first', 'RED-GREEN-REFACTOR', or the Japanese equivalent 'TDDで実装'.

What is the benefit of the RED phase in this workflow?

The RED phase ensures that the test is capable of failing, which validates that the test is actually checking the requirement and prevents 'false positives' in your test suite.

Can it detect my project's programming language?

Yes, it automatically detects the environment by looking for configuration files like package.json, pyproject.toml, or .sln files to determine the correct test runner.

Which testing frameworks does this skill support?

The TDD skill supports Vitest and Jest for TypeScript/JavaScript, pytest and unittest for Python, and xUnit, NUnit, or MSTest for C#.

Does this skill help with code coverage?

Yes, it enforces a minimum of 80% code coverage for general logic and mandates 100% coverage for critical components like financial calculations or security logic.

TDD Workflow

Name: TDD Workflow
Author: NagasakaH

byNagasakaH

0•

Seguridad y Pruebas

Implements a disciplined Red-Green-Refactor cycle to ensure high-quality code and comprehensive test coverage across multiple programming languages.

The TDD (Test-Driven Development) skill transforms Claude into a test-first developer, enforcing the rigorous methodology of writing failing tests before implementation. It supports automatic language detection for TypeScript, Python, and C#, selecting the appropriate framework like Vitest, pytest, or xUnit. By guiding the user through interface definition, minimal implementation, and refactoring, it ensures that every line of code is purposeful and backed by a test suite, targeting a minimum of 80% code coverage to maintain long-term codebase health and reliability.

Características Principales

01Strict Red-Green-Refactor cycle enforcement

02Built-in best practices for unit, integration, and E2E testing

03Pre-configured support for Vitest, Jest, pytest, and xUnit

04Targeted 80% minimum code coverage monitoring

05Automated language detection for TypeScript, Python, and C#

060 GitHub stars

Casos de Uso

01Developing new features with a test-first approach to minimize bugs

02Safely refactoring complex logic while maintaining behavioral integrity

03Fixing regressions by creating reproduction test cases before applying fixes

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add nagasakah/devcontainer tdd

For use in Claude.ai and ChatGPT

Download Skill